gistfile1.js

var oAuth = new OAuth('https://api.twitter.com/oauth/request_token', 'https://api.twitter.com/oauth/access_token', 'consumer', 'secret', '1.0A', null, 'HMAC-SHA1');
                   
var twitterAccessToken = 'consumer',
    twitterAccessTokenSecret = 'secret';
      
oAuth.post('http://api.twitter.com/1/statuses/update.json', twitterAccessToken, 
twitterAccessTokenSecret, {"status":"Testing api"}, function(error, data) {
  if(error) console.log(error);
  else console.log(data);
});